Taking the local weather in Ust-Sema into account can help you maximise your time at the pool during your trip. The hottest months are usually July and June, with an average temperature of 15°C, while the coldest months are January and February, with an average of -10°C. The snowiest months in Ust-Sema are March, February, January and December, with each month seeing an average of 129 cm of snowfall.